Filter cap



FIG. 1 is a top plan view of a first embodiment of a filter cap design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof, with the opposite side being a mirror image thereof;

FIG. 6 is a top plan view of a second embodiment of a filter cap design;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a left side elevational view thereof;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a rear elevational view thereof;

FIG. 11 is a right side elevational view thereof;

FIG. 12 is a top plan view of a third embodiment of a filter cap design;

FIG. 13 is a bottom plan view thereof;

FIG. 14 is a rear elevational view thereof;

FIG. 15 is a front elevational view thereof; and,

FIG. 16 is a side elevational view thereof, with the opposite side being a mirror image thereof. 

The ornamental design for a filter cap, as shown and described. 